Gravers fit GRS® impact handpieces and standard graver handles. Use this graver blank for custom modification and shaping. GlenSteel™ is a special alloy high-speed tool steel for metal engraving, stone-setting and any demanding work. This material is less brittle than tungsten carbide and easy to grind and sharpen. Cobalt-free GlenSteel™ is also less of a health hazard when sharpening or grinding tools.